1) Does parallax increases with distance? a) yes, it increases b) no, it decreases c) There is no relation of parallax with distance 2) Which exhibits a finite parallax value? a) A star closer to the earth. b) A star farther from the earth. 3) The earth-moon distance is about 60 earth radius. What will be the diameter of the earth (approximately in degrees) as seen from the moon? a) 3 degree b) 4 degree c) 2 degree 4) Calculate the angle of 1 degree in radians a) 1.745* 10^-2 b) 1.745* 10^-3 c) 2.306* 103^ d) 2.908 * 10^5 5) Which is the convenient unit of length to measure large distances in an astronomical scale? a) fermi b) angstrom c) parsec d) metre 6) The sun's angular diameter is measured to be 1920''. the distance D of the sun from the earth is 1.496*10^11 m.what is the diameter of the sun? a) 1.39*10m b) 2.86*10^6m c) 3.09*10^9m d) 1.39*10^9m 7) The distance between two points of observations is called a) curie b) basis c) atm d) yards 8) 1 parsec is equal to how many light-years a) 2 light-years b) 3 light-years c) 7 light-years d) 1 light-year 9) Can parallax be used to measure small distances a) yes b) no 10) If the star is very very far away from the earth ,then the angle would be a) very large b) very small

PARALLAX METHOD

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